Re: [gentoo-user] Re: Finally got a SSD drive to put my OS on

[Mark Knecht <markknecht@gmail.com>]

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On Wed, Apr 19, 2023 at 3:35 AM Peter Humphrey <peter@prh.myzen.co.uk>
wrote:
>
> On Wednesday, 19 April 2023 09:00:33 BST Nikos Chantziaras wrote:
>
> > With my HDD:
> >
> >    # smartctl -x /dev/sda | grep -i 'sector size'
> >    Sector Sizes:     512 bytes logical, 4096 bytes physical
>
> Or, with an NVMe drive:
>
> # smartctl -x /dev/nvme1n1 | grep -A2 'Supported LBA Sizes'
> Supported LBA Sizes (NSID 0x1)
> Id Fmt  Data  Metadt  Rel_Perf
>  0 +     512       0         0
>

That command, on my system anyway, does pick up all the
LBA sizes:

1) Windows - 1TB Sabrent:

Supported LBA Sizes (NSID 0x1)
Id Fmt  Data  Metadt  Rel_Perf
0 +     512       0         2
1 -    4096       0         1

Data Units Read:                    8,907,599 [4.56 TB]
Data Units Written:                 4,132,726 [2.11 TB]
Host Read Commands:                 78,849,158
Host Write Commands:                55,570,509

Error Information (NVMe Log 0x01, 16 of 63 entries)
Num   ErrCount  SQId   CmdId  Status  PELoc          LBA  NSID    VS
 0       1406     0  0x600b  0x4004  0x028            0     0     -

2) Kubuntu - 1TB Crucial

Supported LBA Sizes (NSID 0x1)
Id Fmt  Data  Metadt  Rel_Perf
0 +     512       0         1
1 -    4096       0         0

Data Units Read:                    28,823,498 [14.7 TB]
Data Units Written:                 28,560,888 [14.6 TB]
Host Read Commands:                 137,865,594
Host Write Commands:                209,406,594

Error Information (NVMe Log 0x01, 16 of 16 entries)
Num   ErrCount  SQId   CmdId  Status  PELoc          LBA  NSID    VS
 0       1735     0  0x100c  0x4005  0x028            0     0     -

3) Scratch pad - 128GB SSSTC (No name) M.2 chip mounted on Joylifeboard
PCIe card

Supported LBA Sizes (NSID 0x1)
Id Fmt  Data  Metadt  Rel_Perf
0 +     512       0         0

Data Units Read:                    363,470 [186 GB]
Data Units Written:                 454,447 [232 GB]
Host Read Commands:                 2,832,367
Host Write Commands:                2,833,717

Error Information (NVMe Log 0x01, 16 of 64 entries)
No Errors Logged

NOTE: When I first got interested in M.2 I bought a PCI Express
card and an M.2 chip just to use for a while with Astrophotography
files which tend to be 24MB coming out of my camera but grow
to possibly 1GB as processing occurs. Total cost was about
$30 and might be a possible solution for Gentoo users who
want a faster scratch pad for system updates. Even this
second rate hardware has been reliable and it pretty fast:

https://www.amazon.com/gp/product/B09K4YXN33
https://www.amazon.com/gp/product/B08ZB6YVPW

mark@science2:~$ sudo hdparm -tT /dev/nvme2n1
/dev/nvme2n1:
Timing cached reads:   48164 MB in  1.99 seconds = 24144.06 MB/sec
Timing buffered disk reads: 1210 MB in  3.00 seconds = 403.08 MB/sec
mark@science2:~$

Although not as fast as M.2 on the MB where the Sabrent M.2 blows
away the Crucial M.2

mark@science2:~$ sudo hdparm -tT /dev/nvme0n1

/dev/nvme0n1:
Timing cached reads:   47660 MB in  1.99 seconds = 23890.55 MB/sec
Timing buffered disk reads: 5452 MB in  3.00 seconds = 1817.10 MB/sec
mark@science2:~$ sudo hdparm -tT /dev/nvme1n1

/dev/nvme1n1:
Timing cached reads:   47310 MB in  1.99 seconds = 23714.77 MB/sec
Timing buffered disk reads: 1932 MB in  3.00 seconds = 643.49 MB/sec
mark@science2:~$

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